Energy in our Buildings

Understanding and managing the energy we use to power our buildings is an important part of Raleigh’s Community Climate Action Plan (CCAP). In fact, buildings and energy account for nearly half of community greenhouse gas emissions in the city. We can improve the impacts of our energy use on climate change by using less energy (conserving energy), reducing the amount of energy it takes to do what we need to do (using energy more efficiently), or reducing the amount of carbon released from the energy we use (using renewable energy).

The City of Raleigh has several energy initiatives that cover all of these areas: energy conservation, energy efficiency, and renewable energy. We are committed to improving how we use energy and using new energy technologies to reduce our greenhouse gas emissions and save money for our residents.

Energy Efficiency

A rendering of a lobby with a staircase and suspended light installation — Ratio Architecture rendering of the Civic Campus East Tower Lobby with Narduli Studio Light Installation.

The City applies high standards for energy efficiency for all new municipal buildings and building upgrades. We also test and apply new technologies with the potential to provide energy savings while maintaining the same level of service and safety for our residents.

Leadership in Energy and Environmental Design (LEED) Buildings

Since 2007, the City of Raleigh has had a policy that new municipal buildings over 10,000 square feet be certified at least at LEED Silver levels. LEED is an internationally recognized certification system for energy efficiency and environmental design. The City will also seek LEED Gold or Platinum Certifications where practical and when funding is available.

We are also prioritizing energy efficiency improvements to existing City buildings. Construction and additions of less than 10,000 square feet will not necessarily seek LEED Certification but will be designed to those same standards for energy efficiency.

For more information about Energy Efficiency standards, check out our 2023 CCAP Implementation Report. Our CCAP Data Dashboard also includes information on Raleigh LEED facilities here.

Raleigh also has 114 Energy Star Buildings, totaling over 15 million square feet throughout the city. Energy Star is a U.S. Environmental Protection Agency program that certifies buildings meeting strict energy and greenhouse gas emissions standards.

An often-overlooked element of energy efficiency involves allowing inherently energy-efficient housing types. Apartments and townhouses use much less energy than detached houses, because they share walls and/or ceilings and because they are smaller on average. That matters, because the homes we live in make up the majority of building space in the city. That means making townhouses and apartments legal to build in more places is a major energy efficiency strategy for Raleigh.

Utility Data Management

In order to properly manage energy demand, the City tracks energy use and efficiency. It has begun implementing a best practice analysis software solution, EnergyCap. This software will allow the City to track energy and non-energy utility usage, benchmark buildings, capture utility bill data, monitor meter readings, and spot trends that identify areas for potential energy savings. The actual consumption data for energy use should be a game changer for the City of Raleigh organization as we work to identify areas for efficiencies.

Renewable Energy

Renewable energy is energy derived from natural processes that are regenerative over short periods of time, or which cannot be depleted. Solar and geothermal are the most viable renewable energy sources in Raleigh, but other examples include biomass, wind, and hydroelectric power. These alternative energies add to Raleigh's energy security and can save the City money over time.

Learn more about city solar and geothermal installations below.

Solar Energy

A City car sits under a large panel marked as "Solar Power Charging Station" — Raleigh is using federal funds for solar-powered electric vehicle chargers. The City will make two chargers available to the public - keep an eye out for more information on when this will become available.

The City of Raleigh has a long history of supporting solar energy, installing at a number of facilities with the total capacity of these City-owned systems at 1.9 Megawatts (MW). The new City of Raleigh LEED Gold Certified Law Enforcement Training Center continues to expand the City’s renewable energy portfolio by including geothermal technology for heating and cooling.

In addition, Raleigh achieved the SolSmart Silver designation in 2022. The SolSmart program certifies cities that address local community barriers to solar energy, develop innovative solutions to promote solar installation, and educate and engage community members on the benefits of solar energy.

In 2022, Raleigh City Council approved $2 million in American Rescue Plan (ARPA) funds to be used for the evaluation and installation of various solar projects across the City, ranging from an evaluation of a solar farm at the closed Wilder’s Grove Landfill, solar installations on city facilities, as well as other solar technologies. Staff will evaluate and implement these projects over the course of the next few years.

The City of Raleigh also recently completed the first phase of its Solarize the Triangle campaign. Solarize the Triangle is a community-based group-purchasing program for solar energy, and other clean-energy technologies. This initiative is designed to serve residents, and help Triangle homeowners, businesses and nonprofits within 11 Triangle locales to become more resilient, reduce energy expenses, and save on the cost of renewable-energy systems. Solarize campaigns are driven by community group purchasing by obtaining volume discounts on materials and installation services. The more participants who enroll, the greater the savings for all.!

Geothermal

Geothermal heating and cooling systems use ground temperatures as an energy source for heating and cooling comfort. Though outdoor temperatures fluctuate throughout the year with seasonal changes, ground temperatures four to six feet below the Earth's surface remain relatively moderate and constant year-round.

During the heating cycle, the water circulating through the l system extracts heat from the ground. The geothermal unit compresses the extracted heat to a high temperature and, delivers it to the facility through a heat system. The process is reversed for the cooling cycle. Because the earth is much cooler than the air temperatures on a hot day, the geothermal system removes heat from a business or residence and deposits it into the ground. Also, some of the heat that is removed by the geothermal system can be used to heat water.

This highly efficient way of heating and cooling has been installed at some City of Raleigh facilities.

Where is Raleigh using Geothermal energy?

The Transit Operations Facility has 150 geothermal wells, each 300 feet deep.
Wilders Grove Solid Waste Services Center has 60 geothermal wells installed.

Energy Conservation

Just as important as clean energy generation is energy conservation. Here again, we rely on technology and design to generate energy and cost savings.

We utilize occupancy sensors and other sophisticated building automation systems to manage energy use in our buildings. This ensures that when staff are not present, we are not unnecessarily using energy. These systems also diagnose problems to prevent energy waste.

As mentioned above, in many municipal buildings we utilize passive solar design such as large windows that allow in natural light and the use of building materials to absorb or deflect solar radiation and use it to limit energy usage within buildings.